noun
subject, field
A2
Fach (das) commonly means a school subject or a field/area of expertise. It is a neuter noun with plural Fächer (umlaut + -er). Declension varies (das Fach, die Fächer). No special preposition; used in compounds (Fachbereich) and contexts like Schulfach or Studienfach.
Examples
Ich habe mein Fach verloren.
I lost my locker.
Mathematik ist mein Lieblingsfach in der Schule.
Math is my favourite subject at school.
Er arbeitet in einem fachlichen Bereich, der Computertechnik betrifft.
He works in a field related to computer technology.
Details
Mnemonics
A shelf with labeled compartments for different subjects.
Think 'fakulty' -> 'Fach' = subject/field.
das — many short nouns for academic subjects are neuter: das Fach.
Notes
Plural 'Fächer' and often used for school subjects or professional fields.